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Finding the Fourth Proportional to 2,068.23, 3,102.55 and 681.58

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Solution

The fourth proportional to 2,068.23, 3,102.55 and 681.58 is: 1,022.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,068.23 : 3,102.55 = 681.58 : x
  2. Step 2: Convert to fraction form
    2,068.23/3,102.55 = 681.58/x
  3. Step 3: Cross multiply
    2,068.23x = 3,102.55 × 681.58
  4. Step 4: Simplify right side
    2,068.23x = 2,114,636.03
  5. Step 5: Solve for x
    x = 2,114,636.03/2,068.23
  6. Step 6: Final answer
    x = 1,022.44

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.